Add VEAEncoder to VideoTrackRecorder

media/gpu/vt_video_encode_accelerator_mac.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/gpu/vt_video_encode_accelerator_mac.h"
 
 #include <memory>
 
 #include "base/mac/mac_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 320 matching lines @@
     frame_rate_ = framerate > 1 ? framerate : 1;
     media::video_toolbox::SessionPropertySetter session_property_setter(
         compression_session_, videotoolbox_glue_);
     rv = session_property_setter.Set(
         videotoolbox_glue_->kVTCompressionPropertyKey_ExpectedFrameRate(),
         frame_rate_);
     DLOG_IF(ERROR, !rv)
         << "Couldn't change frame rate parameters of encode session.";
   }
 
-  if (bitrate != static_cast<uint32_t>(adjusted_bitrate_)) {
-    target_bitrate_ = bitrate > 1 ? bitrate : 1;
+  if (bitrate != static_cast<uint32_t>(adjusted_bitrate_ && bitrate != 0)) {
     bitrate_adjuster_.SetTargetBitrateBps(target_bitrate_);
     adjusted_bitrate_ = bitrate_adjuster_.GetAdjustedBitrateBps();
     media::video_toolbox::SessionPropertySetter session_property_setter(
         compression_session_, videotoolbox_glue_);
     rv = session_property_setter.Set(
         videotoolbox_glue_->kVTCompressionPropertyKey_AverageBitRate(),
         adjusted_bitrate_);
     rv &= session_property_setter.Set(
         videotoolbox_glue_->kVTCompressionPropertyKey_DataRateLimits(),
         media::video_toolbox::ArrayWithIntegerAndFloat(
@@ skipping 219 matching lines @@
          (encoder_thread_.IsRunning() &&
           encoder_thread_task_runner_->BelongsToCurrentThread()));
 
   if (compression_session_) {
     videotoolbox_glue_->VTCompressionSessionInvalidate(compression_session_);
     compression_session_.reset();
   }
 }
 
 }  // namespace media